Boiler



F. A. FERGUSON ETAL B0 ILER April 20, 1943.

Filed Aug. 3, 1940 3 Sheets-Sheet 1 A ril 20, 1943;

F. A. FERGUSON ETQAL BOILER Filed Aug. 3, 1940 a Sheets-Sheet 2 Jrzaenions" zziywam J Jar '6 April 20, 1943.

BOILER Filed Aug. 3, 1940 F. A. FERGUSON ETAL 3 Sheets-Shut 11:11:11 lllllllllll,

Patented Apr. 20, 1943 UNITED STATES PATENT OFFICE BOILER;

Franklin A. Ferguson and Edgar C. Des jardins, Westfield, Mass, assignors to The H. B. Smith Company, Incorporated, Westfield, Mass, a corporation of Massachusetts Application August 3, 1940, Serial No. 350,856

7 Claims.

This invention relates to an improvement in boilers more particularly in sectional boilers of the well known Mills type, the sections of which have vertically extending water tubes in their upper parts which provide maximum heat absorption, free flowing circulation and quicker steammg.

One feature of this invention resides in the formation of the partitions between upper and lower side fiues as integral parts of the sections, such partitions being in the form of dry fins or cored water tubes or a combination of tubes: and fins.

Another feature of this invention resides in the provision upon the vertical water tubes of vertical fins thereby increasing the heat absorbing surface and directing the flow of the com bustion gases.

Still another feature of this invention resides in the mounting within the rearmost section of a tankless water heater.

These and other features of the invention are included in the embodiment of this invention set forth in detail in the following description and illustrated in the accompanying drawings in which:

Fig. 1 is a perspective view with parts broken away of a boiler embodying this invention;

Fig. 2 is a front elevation of the upper portion of one of the leg sections of said boiler;

Fig. 3 is a cross-sectional view through two adjacent leg sections taken along the line 33 in Fig. 2;

Fig. 4 is a similar cross-sectional view taken along the line 4-4 in Fig. 2;

Fig. 5 isa cross-sectional the line 5-5 in Fig. 1; V

Fig. 6 is a front elevation of the rear section of the boiler with parts broken away;

Fig. 7 is a side view of such section the panel of the tankless heater being removed; and

Fig. 8 is a view in side elevation of a portion of the rear end of the boiler with parts broken away. I

The boiler l5 selected as an illustration of this invention comprises a plurality of leg sections 16, a rear section I7, and a casing I8. The sections are securely bolted into contact and register with each other. Mounted upon the front Wall of the casing iii are doors [9 and while mounted upon the rear wall thereof is a smoke stack 2|. Each leg section I6 is of cast iron and comprises a pair of vertical tubular legs 22 which merge into a horizontal compartment 23 and thus enclose the firebox 24 on three sides.

view taken along Through the compartment 23 and at right angles thereto extend side flues 25, 26' and a plurality of radiating tear-shaped passages 21, three such passages being here shown. The compartments 23 are joined by nipples 28 into a continuous system. The upper and lower side flues are sepmated by partitions 30 preferably as here shown integral parts of the section. The partition 39 comprises a cored tube 3| and fins 32 diametrically projecting from the tube. The mouth of the lower flue 26 is enclosed by a bead 33 which extends along the surface of the section near the outer edge thereof, by beads 34 and 35 and by the fin 32. As shown in Figs. 4 and 8, the edges of the fins 32 do not come into contact when the sections are assembled so that gases may pass between them from the flue 25 to the flue 26 and thus heat portions of the boiler surfaces heretofore inaccessible.

Mounted between the passages 27 are fins 4B which are here shown (Fig. 3') as integral projections from a tubular core 4!. These fins act to direct the gases arising from the firebox into the flues 25 and also increase the heat absorbing surface in thepath of the gases.

The rear section I! which closes the rear end of the fire boxis providedwith fiues which are in substantial alignment with the lower flues 26 of the leg sections. Above the fiues 45' is a chamber 41' jointed to the system by a nipple (not shown) similar to nipples 28. The front and rear walls of the chamber are connected by fiat straps 43. Mounted within the chamber 47 is a water heating unit 50, "one,'for example, of the type known in the trade as a tankless heater, and comprising a plurality of lengths of pipe 51 through which a stream of water is passed from inlet 52 to outlet 53. The chamber 3'! being part of the water system, the water in the lengths of pipe is heated. The pipe lengths preferabl but not necessarily extend transversely of the section, as shown in the drawing. The lengths are carried by a plate 54 which is removably secured to the section wall and are so arranged that they straddle the straps 43 (Fig. 6). Some of the gases which rise from the rear end of the fire box between the rear section I! and the leg section I6" adjacent to its escape past the fins 32 into the flues 4'5 and thence directly to the smoke stack 2!, thus making active surfaces which are normally more or less inactive and creating a draft which improves the combustion of the fuel.

The doors [9 are preferably sealed to prevent escape of gases from the boiler. Thus, as shown in Fig. 5, the door frames 55 are provided with ribs 56 and the door panels are provided with recesses 51 which receive such ribs. Preferably a packing 58 of asbestos or other suitable material is laid in the recesses to seal the doors when tightly closed by nuts, bolts or the like.

As in all boilers of this type the draft from the stack establishes and maintains a fiow of gases forwardly through the passages formed by the flues to the front of the boiler, thence downwardly through the space or connecting, duct defined by the outer face of the front secthe upper and lower fiues, and the passage tion and the front wall of casing I8 (Fig. 11;"

and rearwardly through the passages formed by the fiues 26 and to the stack or smoke hood 2|.

The gases which rise from the fuel in the fire box 24 into the spaces formed between each two adjacent sections freely enter this fiow through formed by the lower flues being in communication with the smoke stack, whereby the gases rising from the fire box into the spaces between the sections enter the upper flues freely and the lower fiues between said fins and travel forwardly through the upper passage, downwardly through the fiues 25. The mouths of the fiues 26 are partially enclosed by the beads 34 and 35 and the fins 32. Hence only such gases as are drawn in by the flow through the lower passages enter the flues 26 between the fins 32 (see Figs. 4 and 8) the beads 34 and 35 being in contact (see Fig. 3)

The fins 4B deflect the rising gases toward the open fiues.

While one embodiment of this invention has been shown and described in detail, itwill be understood that the invention is not limited thereto and that other embodiments of the invention may be made without departing from'the spirit and scope thereof.

We claim:

1. A boiler comprising a plurality of vertical sections assembled in contact along the top and side edges and spaced apart within said edges, each section, in advance of the'rear section, comprising water legs and a horizontal compartment connecting said legs'and enclosing therewith the fire box on three sides from which box gases rise into the spaces between the sections, and having pairs of flues through said compartment at right angles thereto and arranged one above the other, the mouths of the lower flues being enclosed at their bottom and sides by beads projecting outwardly from the surfaces of the compartments and by beads at the edges of the sections, which fiues, when the sections are assembled, register to form passages extending longitudinally through the boiler, and nipples connecting the compartments of the sections, a casing adjoining the front section so as to provide a connecting duct between the passages formed by the upper and lower fiues, the passage formed by the lower flues being in communication with the smoke stack whereby the gases rising from the fire box into the spaces betweenthe sections enter the upper flues and travel forwardly through the upper passage, downwardly 7 through said connecting duct and rearwardly through the lower passage to the smoke stack, and fins carried by said sections which deflect the gases toward said upper flues.

2. A boiler comprising a plurality of vertical sections assembled in contact along the top and side edges and spaced apart within said edges, each section, in advance of the rear section, comprising water legs and a horizontal compartment connecting said legs and enclosing therewith the fire box on three sides from which box gases rise into the spaces between the sections, and having pairs of flues through said compartment at right angles thereto and arranged one above the other, nipples connecting the compartments of'the sections, a partitionseparating said fiues, and outwardly projecting fins on the partition, the

said connecting duct and rearwardly through the lower passage to the smoke stack. 7

3. A boiler comprising a plurality of vertical sections assembled in contact along the top'and side edges and spaced apart within saidedges.

each section, in advance of the rear section, comprising water legs and a horizontal compartment connecting said legs and enclosing therewith the fire box on three sides from which box gases rise into the spaces between the sections, and having pairs of fiues through said compartment at right angles thereto and arranged one above the other, nipples connecting the compartments of the sections, the mouths of the upper flues terminating at the surfaces of the sections and the mouths of the lower flues being enclosed at their bottoms and sides by means projecting outwardly from such surfaces and by means projecting outwardly from the edges of the sections, which fiues, when the sections are assembled, register to form passages extending longitudinally through the boiler, a casing adjoining the front section so as to provide a con necting duct between the passages formed by the upper and lower flues, the passage formed by the lower flues being in communication with the smoke stack, whereby the gases'rising from the fire box into the spaces between the sections enter the upper flues freely and travel forwardly through the upper passage, downwardly through said connection duct and rearwardly throug the lower passage to the smoke stack.

4. A boiler comprising a plurality of vertical sections assembled in contact along the top and side edges and spaced apart within said edges. each section, in advance of the rear section,

comprising water legs and a horizontal compart ment connecting said legs and enclosing therewith the fire box on three sides from which box gases rise into the spaces between the sections, and having pairs of flues through said compartment at right angles thereto and arranged one above the other, nipples connecting the compartments of the sections, the mouths of the upper flues terminating at the surfaces of the sections and the mouths of the lower flues being enclosed at their bottoms and sides by means projecting outwardly from such surfaces and by means projecting outwardly from the edges of the sections, which fiues, when the sections are assembled, register to form passages extending longitiudinally through the boiler, a casing adjoining the 'front section so as to provide a connecting duct between the passages formed by the upper and lower fiues, the passage formed by the lower flues being in communicationwith the smoke stack, whereby the gases rising from the fire box into the spaces between the sections enter the upper flues freely and travel forwardly through the upper passage downwardly through said connecting duct and rearwardly through the lower passage to the smoke stack, and fins carried by said sections which deflect the gases toward said upper flues.

5. A boiler comprising a plurality of vertical sections assembled in contact along the top and side edges and spaced apart within said edges, each section, in advance of the rear section, comprising water legs and a horizontal compartment connecting said legs and enclosing therewith the fire box on three sides from which box gases rise into the spaces between the sections, and having pairs of flues through said compartment at right angles thereto and arranged one above the other, the mouths of the upper flues terminating at the surfaces of the sections and the mouths of the lower flues being enclosed at their bottoms and sides by means projecting outwardly from such surfaces and by means projecting outwardly from the edges of the sections, which flues, when the sections are assembled, register to form passages extending longitudinally through the boiler, a casing adjoining the front section so as to provide a connecting duct between the passages formed by the upper and lower flues, the rear section comprising a horizontal compartment and having a flue which registers with said lower flues and through which communication of the lower passage with the smoke stack is provided, nipples connecting the compartments of the sections, and a water heating unit mounted within the compartment of said rear section.

6. A boiler comprising a plurality of vertical sections assembled in contact along the top and side edges and spaced apart within said edges, each section, in advance of the rear section, comprising water legs and a horizontal compartment connecting said legs and enclosing therewith the fire box on three sides from which box gases rise into the spaces between the sections, and having at each side a pair of flues through said compartment at right angles thereto and arranged one above the other, the mouths of the upper flues terminating at the surfaces of the sections and the mouths of the lower flues being enclosed at their bottoms and sides by means projecting outwardly from such surfaces and by means projecting outwardly from the edges of the sections, which flues, when the sections are assembled, register to form passages extending longitudinally through the boiler, the rear section comprising a horizontal compartment and having a pair of flues below said compartment which register with said lower flues and through which communication of the lower passages with the smoke stack is provided, a casing adjoinin the front section so as to provide a connecting duct between the passages formed by the upper and lower flues, and nipples connecting the compartments of the sections, whereby the gases rising from the fire box into the spaces between the sections enter the upper flues and travel forwardly through the upper passages, downwardly through said connecting duct and rearwardly through the lower passages to the smoke stack.

7. A boiler comprising a plurality of vertical sections assembled in contact along the top and side edges and spaced apart within said edges, each section, in advance of the rear section, comprising water legs and a horizontal compartment connecting said legs and enclosing therewith the fire box on three sides from which box gases rise into the spaces between the sections, and having at each side a pair of flues through said compartment at right angles thereto and arranged one above the other, the mouths of the upper flues terminating at the surfaces of the sections and the mouths of the lower flues being enclosed at their bottoms and sides by means projecting outwardly from such surfaces and by means projecting outwardly from the edges of the sections, which flues, when the sections are assembled, register to form passages extending longitudinally through the boiler, the rear section comprising a horizontal compartment and having a pair of flues below said compartment which register with said lower flues and through which communication of the lower passages with the smoke stack is provided, a casing adjoining the front section so as to provide a connecting duct between the passages formed by the upper and lowe flues, and nipples connecting the compartments of the sections, whereby the gases rising from the fire box into the spaces between the sections enter the upper flues and travel forwardly through the upper passages, downwardly through said connecting duct and rearwardly through the lower passages to the smoke stack, and fins carried by said sections which deflect the gases toward said upper flues.

FRANKLIN A. FERGUSON. EDGAR C. DESJARDINS'. 

